Adjustable mold oh form for concrete cistern curbs



March 31. 1925. 1,531,781

C. F. GRETZMACHER ADJUSTABLE. MOLD 03 FORM FOR CONCRETE CISIERN CURBS Filed July 24,- 924 2 Shouts-Sheet 1 HTTOEfiEY March 31. 1925.

- 1,531,781 c. F. GRETZMACHER ADJUSTABLE MOLD 0R FORM FOR CONCRETE CISTERN CURBS Filed July 24, 1924 2 Sheets-Sheet 2 I N l/E/V r02 67 F. Grc/zmac/yw Patented Mar. 31, 1925.

, ranger PATENT OFFICE;

coNsrAn'rm r. GRETZMACHER, "or CHESTER, ILLINOIS. f

- ADJUSTABLE Morin on FORM FOR corroarirnorsrnniv 'CURBS.

Application filed July 24, 1924. Serial No; 727,939.

ToaZZ whom it mag concern: I

Be it known that I, ConsrANTIN Gnnaz- MACHER, a citizen otthe United States residing in the city of Chester, in the ta-te of Illinois, have invented a certain new and useful Improvement in an Adjustable Mold or Form for Concrete Cister-n Curbs, of which the following is a full, clear, and exact specification. I r

My invention refers to a mold, 0r;form, for making concrete cistern curbs, and especially to a colla sible, adjustable form.

One object of my invention is to provide a collapsible form, or mold, which may easily transported and readily set up and adjusted for making curbs for cisterns, wells, or other reservoirs for holding liquids.

Another object of m invention is the production of a curb, or form, to be used in combination with chain or bucket p-umps that may be readily adjusted to different sizes of chain or bucket pumps and, also, readily adjusted to suit cisterns, or other liquid reservoirs, where the openings are of various sizes. I e r A still further object of invention is to provide a mold, or form, for cistern curbs that will effectively prevent insects, reptiles, or small quadrupeds from being-precipitated into said reservoirs and to makeit difiicult or impossible for them to enter said reservoirs in quest of water. I

$t'ill further objects advantages of my invention will be apparent from the more detailed description which is to follow.

Referring now to the drawings made a part of this specification:

Fig. I is a perspective view of a cistern curb together with its; seven I Fi II is a sectional side elevation, show ing the arrangement of the pinup. 4

Fig. III is a longitudinal cross-section throughthe wheel opening.

Fig. IV is a cross-section at 44 in Fig. III. K v

Fig. V is a longitudinal crosssecti-on of the body of the curb.

Fig. VI is a cross-section of the same at 6- 6 in Fig. V. a

Fig. VII is a cross-section of the cover of my curb form.

Fig VIII is a cross-section at 8'-8 in Fig. VII, 7 r 1 I In sections of the country where natural sources of Water supply are absent, or

limited, it is customary to excavate a reservoir lathe ground and Wall up samewith brick or stone or concrete in such a manner that it becomes water-tight. The Water plete-ly covered to prevent theaccumulation of dirt and -other foreign matter and, also,

prevent insects, reptiles and small quadrupeds from of water. I If a wooden platform is used, the timber soon rots away and niakesyit an easy matter for insects,- reptiles and small qiiiad-rupeds to gain access thereto, and thus the water is contaminated and made unfit for use.

gaining ingress thereto inquest For these reasons of late years cisterns I have been covered either by stone or concrete slabs. As itis necessary to have an opening for the purpose of drawing water therefrom, all of the covers are provided with openings but not of a uniform or standard size, hence if a curb, by which is meant the upright support of a chain or bucket pump, is to serve the purpose of preventing insects and reptiles from having access thereto, it must securely cover thehole 'or'openin-g already made, which as stated above are of various sizes,that is to say no standard size hole h'asbeen adopted. a f

It is, therefore, desirable that a form,

which is to be used for making curbs to suit different size openings, have some means of adjustmentby which these various size openings can be securely covered. It isnot only necessary that the cisterns be made inaccessible to insects and reptiles, but they must, also, be open to the atmosphere in order that the water may be aerated by natural means, otherwise it would become stagnant and unfit for use;

It will be readily understood that it each cistern curb, had to be built by making a special form for packing the concrete, the expense would be greatly increased, even prohibitive. a Y

I have, therefore, designed a concrete form for mak g c rbs of various sizeslthat may be readily adjusted, and while have illus- The cistern curb to which my invention relates consists of a main body portion A, a cap B, a cistern cover C, an additional cover .D for the opening in the cover C, of an endless chain E, and a rotatable wheel F, and a spout G.

In my preferred method of construction, a sheet metal cover 1 is formed in the shape desired for the body A of the curb. The sheet metal cover is preferably composed of two parts, which are longitudinally joined together by means of having their margins turned at right angles to form a suitable flange 2, said flange having perfo rations 3 at suitable distances apart and bolted together by bolts and wing nuts 4. Near the base of the curb, the cover is hinged at 5, which permits a lateral movement of the lower portion 6, which is secured at any particular angle by means of bolts and wing nuts, said bolts being passed through the holes in the under members, shown at 7 in Fig. V.

The purpose of this construction is to provide for adjustment to suit cisterns having difl'erentsize openings in their covers. A plurality of Z-shaped members 8 are provided to hold the bottom part 9 of the form in position over the opening in the cistern. A U-shaped member 10 attached to the bottom part 9 of the form serves the purpose of holding a joint of pipell, screw-threaded at its lower end 12, in position while the concrete is being poured into the mold. A like section of'pipe 13 is placed in position parallel with the pipe 11, which serves as a guideway for the return of the chain F.

When the form is pro-perlyadjusted and placed in position upon the cistern curb, a conventional type chain pump, consisting of an endless chain having rubber buttons spaced apart at suitable distances and caused. to rotate perpendicularly by means of a sprocket wheel E and a suitable crank 14:, is placed on top of the main body of the curb, in its natural position.

Before'placing the sprocket wheel E and it axle 15 in position, a curvilinearform 16, substantially rectangular in cross-section, is placed in the center of the main body of the curb and held in position by the weight of the wheel and chain.

A similar curvilinear form 17 is provided in the top portion, or cap, B of the form, so, that when the cap Bis placed in position and secured by the bolts and wing nuts 4,

the form is ready to be filled withconcrete.

A cast iron spout G is'held in'position by means of stud bolts 18 cast into the body of the concrete wall.

The form for the cover D, as shown in Figs. VII and VIII, may be made to suit any size opening by securing the blocks 19 at aproper distance apart upon the base board 20.

Having thus fully described my invention, what I claim as new and useful and desireto secure by Letters Patent is z" 1. An adjustable form, or mold, for making concrete cistern curbs and covers, comprising a form, or mold, composed of two ormore sections adapted to be detachably joined together in such a manner as toform a casing, the general contour of which is that of a conventional cistern curb, and having near its base a hinged portion adapted to be moved either outwardly or inwardly for the purpose ofincreasing or decreasing the area of the base of said curb, and having means for securing said hinged portion in predetermined positions, andhaving a plurality of Z-shaped members adapted to hold the bottom of said cistern mold in position overthe opening into the cistern, as described and forthe purposes set forth.

2. An adjustable form, or mold, for making concrete cistern curbs and covers, comprising a form, or mold, composed of two or more sections adapted to be detachably joined together in such a manner as to form a casing, the general contour of which'is that of a conventional cistern curb, and having near its base a hinged portion adapted to be moved either outwardly or inwardly for the purpose of increasing or decreasing the area of the base of said curb, and hav ing a plurality of Z-shaped membersadaptedto hold the bottom of said cistern mold in position over the opening in the cistern, said bottom, being provided with a Ushaped member adapted to hold in position a section of threaded pipe, and having a curvilinear housing adapted to enclose a sprocket wheel and chain, thereby forming a recess in the concrete, in which said wheel and chain are adapted to rotate, as described and for'the purposes set forth.

3. An adjustable form, or mold, for making cistern curbs, comprising a metal outer casing composed of two or more detachably joined sections, having their marginal edges flanged and turned at'right angles to the main body of the mold and adapted to be bolted together by means of bolts and wing nuts and having adjacent to their base a hinged portion adapted to be adjusted outwardly or inwardly in order to cover open" ings of various sizes, and having means for holding said hinged portion in a plurality of pr determin d bed me and havi means for closing the base of said form, or mold, and having a separate and independent lnold for forming the cap or top of the cistern curb and havingmeans for adjusting the mold to various size openings, as described and for the purposes set forth.

In Witness whereof I have hereunto affixed 1 y signature this 17th day of July, v 1924, in the presence of two Witnesses.

Witnesses IIEXRY STOEVER, MICHAEL PosTMAN. 

